The　effects　of　Pure　Al/Pure　Fe　and　Al　+　0.88Si/Fe　+　1.48Si　intermetallics　on　the　interfacial　bonding　properties　of　Al/Fe　composites　were　studied.　The　results　showed　that:　When　there　was　no　Si　addition,　IMC　was　just　formed,　when　the　thickness　was　between　200　nm　and　500　nm,　there　was　no　crack　in　the　interface　and　the　bonding　strength　was　high.　With　the　increase　of　IMC　thickness,　discontinuous　compounds　began　to　form　on　the　interface,　crack　appeared　on　the　Al　side　of　the　interface,　the　bonding　strength　decreased　slightly.　With　the　extension　of　heat　treatment　time,　IMC　became　continuous　distribution,　the　crack　length　and　width　increased　obviously,　the　interfacial　bonding　strength　decreased　significantly.　After　the　addition　of　Si,　the　IMC　was　mainly　discontinuous,　and　the　interface　did　not　form　crack.　Under　the　similar　IMC　thickness,　the　interface　bonding　strength　was　much　higher　than　that　of　the　composites　without　Si.